1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    *
5    *
6    *
7    * The contents of this file are subject to the terms of the Liferay Enterprise
8    * Subscription License ("License"). You may not use this file except in
9    * compliance with the License. You can obtain a copy of the License by
10   * contacting Liferay, Inc. See the License for the specific language governing
11   * permissions and limitations under the License, including but not limited to
12   * distribution rights of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.taglib.faces.util;
24  
25  import com.liferay.portal.kernel.util.Validator;
26  
27  import javax.faces.application.Application;
28  import javax.faces.context.FacesContext;
29  import javax.faces.el.ValueBinding;
30  import javax.faces.webapp.UIComponentTag;
31  
32  /**
33   * <a href="JSFTagUtil.java.html"><b><i>View Source</i></b></a>
34   *
35   * @author Neil Griffin
36   */
37  public class JSFTagUtil {
38  
39      public static String eval(String expr) {
40          if (Validator.isNotNull(expr) &&
41              UIComponentTag.isValueReference(expr)) {
42  
43              FacesContext facesContext = FacesContext.getCurrentInstance();
44  
45              Application application = facesContext.getApplication();
46              ValueBinding valueBinding = application.createValueBinding(expr);
47  
48              expr = String.valueOf(valueBinding.getValue(facesContext));
49          }
50  
51          return expr;
52      }
53  
54  }